The U.S. version of Samsung's (SSNLF.PK) Galaxy S IV will use a quad-core Qualcomm (QCOM)...

The U.S. version of Samsung's (SSNLF.PK) Galaxy S IV will use a quad-core Qualcomm (QCOM) processor, while international versions will use Samsung's Exynos Octa, Bloomberg reports. The S IV also said to include eye-tracking tech , but it won't support automatic scrolling (as was previously reported) just yet. Other details about the phone, which will be unveiled tomorrow, are in-line with past reports. Separately, the WSJ observes Samsung spent $401M in 2012 on phone advertising in the U.S. (per Kantar Media), more than Apple's (AAPL) $333M.